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ethereum-address

README.md

Hooks

A sample app that showcases how to derive an Ethereum address for an authenticated user of Juno on the Internet Computer.

Concept Overview

  • User Authentication: Upon sign-in, Juno's authentication registers a user in the Satellite smart contract, specifically within a non-public collection named #user.
  • Triggering Serverless Hooks: The creation of a user entry automatically triggers the serverless function hook on_set_doc.
  • Ethereum Address Derivation: Within this hook, an Ethereum address is derived using threshold ECDSA.
  • Profile Saving: The derived Ethereum address is then stored in another collection called profiles. This collection is initially created by the developer of the Satellite project and is configured in juno.dev.config.ts for local development purposes.
  • Frontend Integration: Users can utilize the get function on the frontend to retrieve their Ethereum address seamlessly.

Additionally, the frontend features an action named balance that queries the balance of the loaded Ethereum address on the Sepolia network via Etherscan. This is achieved without requiring an API key, utilizing public queries.

Getting started

git clone https://github.com/junobuild/examples
cd rust/ethereum-address
npm ci

Local development

Running the frontend app:

npm run dev

Starting the local development (using Docker):

juno dev start

Building and deploying the extended Satellite:

juno dev build